Possible Clues:

• 'Wish I could help'
• 'Impossible'
• "Sorry, that's impossible"
• 'Ain't gonna happen'
• Agreement about prison? Nothing is impossible
• Old knight upset a name in Conservative party? That's not possible
• 'Out of the question'
• 'I'm unable to comply'
• Impossible
• Making a comeback - Sting and The Police at the Centre locally? That ain't going to happen!